What does Design Facts measure?
Design Facts reads the design's own geometry at its true size. It reports the outer dimensions in millimetres; for each metal part its volume and its weight in that metal, and the total in 9k gold, 14k gold, 18k gold, 22k gold, Platinum 950 and Sterling silver 925; the stones, grouped by kind and size, with their shape, length, width and depth, count and estimated carat; and for a ring the inside diameter with its US and EU size. Copy summary and Download as JSON take the numbers elsewhere.
How the numbers are worked out
A metal part's volume comes from its closed mesh, and its weight is that volume times the alloy's density (the metals page lists them; the metal weight calculator does the same sum for any volume). A stone's carat is its volume times its specific gravity, divided by 0.2 g. The ring size is the largest circle that fits inside the band, converted with the formulas on the ring size converter.
How accurate is Design Facts?
The figures are estimates from the render mesh. Densities are typical values and alloys vary by a few percent between refiners. Casting adds sprue and loss, which the weight leaves out. Carat assumes the modelled stone's shape is the real one. Verify before you cast or quote.
- A metal part with holes in its surface (an open mesh) has no reliable volume, so it gets no weight. Export closed, solid meshes from your CAD program.
- Parts must be marked as metal or stones in Materials to count.
- The size depends on the file's units: check Scene → Advanced → Source units if the dimensions look a thousand times off.
Where else it appears
Approval links show the same facts for each version, so a client sees the weight, stones and size they are approving, and what changed between versions.